تم الحل ✓
categoryهندسة ميكانيكية
schoolبكالوريوس
event_available2026-07-13
السؤال
Transcribed Image Text:
The effect of a location of the open feedwater heater
on the thermal efficiency of the non-deal cycle of a
steam power plant utilizing the Rankine cycle is to
be investigated. The plant produces 500 MW of
power output. Steam leaves the steam generator at 10
MPa, 500°C, and the cycle has a condenser pressure
of 10 kPa.
1) Plot the influence of the feedwater heater pressure
(in terms of rise of feedwater enthalpy / maximum
rise of feedwater enthalpy) on the cycle efficiency.
Investigate the intermediate pressure at which the
system will give you optimum performance for one
heater.
2) If the cost of installing a single feedwater heater is
5% of the total cost of 0.8 x 106 S/MW of the simple
power plant with no heaters, discuss the economics
of adding feedwater heater(s) with respect to
improvement in the plant efficiency. The cost of heat
energy that is to be added to the boiler may be
considered as 0.02 S/MJ. Also discuss how many
years would be needed to recover the cost of
installing one feedwater heater.
3) Discuss what would be the environmental impact
of adding feedwater heaters?
Deliverables
Your report should include schematic and
temperature-entropy diagrams, all thermal-economic
calculations in addition to the problem statement.
Clearly highlight the advantages and disadvantages
of adding feedwater heaters and the selection of
intermediate pressure(s) to maximize the system
performance. An executive summary describing the
highlights of your achievements should be provided.
Be sure to state all assumptions clearly.
Note: The computer software Engineering Equation
Solver (EES) that can be used for executing the
project is available in the ME department computer
labs.
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